Gas or gasolene engine construction.



c. HBRRBSHOFF. y GAS 0R GASOLBNE ENGINE GONSTRUGTION.

lAmmonxon rILnD 1211.30, 1907.

"Patented Nav. 16,1909.

3m man rez "Totti-Z '/.Lzoiff yif e j r Be it' known that CHARLES Hnnnesiiorr', I

-. Moron G As ORAGASOLE'NE ay concern.'

aicitize'n of the 'United States. residing at TNGINE cONsTRooTIoN.

Specification of Letters Patent. Patentd XQV, 16, 1909. Application ined april so,` 1907. sei-italia@371.120.: j' v y Bi'idgt-\po1t.'in the county Yofv Fairfield and j aviand' useful mprov'enients in Gas or (hfsoleue Flin" 'ie Construction. ofrfhich the folloiviilgis aspeciflcation. l

This invention relatesl to' nnprovements m ticularlyto the construction and arrange- "ment of the crank-case and shaft bearings. the object beingto'provide a solid constructiorrp of citenk [case having continuity of strength'throughout. and at the sametime termediate bearing. and Fig. 3, an end elevation of the crank-case showing the remov able end-plate or door.

The crank case l is cylindrical in its general outline yvith one of the sides of the cylinder produced to a fiat-surfacethrough which there are openings for the piston rod and vfhich tlat surface furnishes a seat for the engine cylimilers. rThis crank casing is made as one integral structure with the side ivalls and one end yvall in a unitary piece and with one end'yrall 3 made as a separate piece and removable therefrom. The end wall 2 Which is integral with the body of the casing is provided centrally yvith a bearing la for the shaft. vided centrally with a bearing -LL for the' crank shaft. The end 3 engages in an opening in the end of the cylinder. which opening is concentric to the shaft axis. and is of a size sufficient to alloyv the crank shaft to be easily withdrawn. and to that end its diameter must be slightly greater than the extate of "Connecticut'- "have invented certain r' 'gas or gasolene engine construction, and parj UMZEED sIarEsgrarnN/T onirica.

.CHARLES :ciEnnaasiaOrr;A or BRIDGEPORT. Commenticon assrGNoR' TOHERRESHOFF COMPANY. or DETROIT. MICHIGAN.. A oonronarronor MICHIGAN.

lrtreme outer travel path ofthe crank pins.

sufficiently greater tor allow theprojecting shoulders on each side of the crank pin to pass through the Vopening' when the crank shaft drawn along the axis of the shaft outl fronrthe crank case. Midway between the tyvo ends of the crank caseintegral with the crank case and projecting inyvard from that side, of the case upon which is Ithe yseat for the engines is a seat for the middlebearf ing to the shaft. This seat. which may be The removable end 3 is also proconsidered as an inverted saddle. arched `with a curvature substantially the same as that of the opening through the end of the A cylinder. and vthe. curvature of the arch to reduce the 'freight thereof. Athereby dei'l creasing the cost thereof materially 'espe-"i cially vvhere expensive metalsI are employed,

concentric tothe axis of the shaft. nthis oir Which the engaging face is aichedto correspond closely with the arch of the saddle in which it attached. Concentric with the arch of the hanger is a journal box which in the assembled structure is in line With the bearings at anda?. The hanger is secured in place inthe Vinverted saddle by bolts T which pass through the walls of the casing l through the structure which comprises the inverted saddle and int,r the hanger 6. The hanger itself is made in tvro parts, one of Which comprises the member yvhich is adapted to engage the saddle and to engage over the shaft.. and the other of yvhich coinpriseS the member which hangs from the lower part of the hanger and engages under the shaft. vithin the opening for the shaft through the compound hanger thusformed may be inserted proper liningsI or bushings 9 which are arranged and adjusted or may be arranged and adjusted While the entire hanger is removed from its attachment to the casing and is separate therefrom, The tivo parts of the hanger are secured `together by screyv bolts l2 which pass through the lower member ofthe hanger and engage in the upper member thereof. This construction affords a very strong but light crank case with the provision for a three point support to the crank axle in a way such that the central support may be very accuratelyv alined with the end supports even though it be made separate therefrom. inasmuch as the inverted saddle in which the hanger engages may be made with a boring tool centered with respect to the end bearings and the hanger itself may be made by lathe yvork and thus insure accuracy of fit between the parts y and, consequently, accuracy of almement 1n the bearings. rlhe center' member may be easily removed endWise by removing the bolts 7 after which the entire crank and the middle bearing slide readily through the 4opening which, in the assembled case, is

closed by the end plate 3.

Havingthus fully described my invent-ion,

what I claim vas new, and desire to secure by bearings and removable endwise from the .case by removing said end-Wall and the securing means of intermediate bearing.

2. The combination with a crank case provided With an inverted saddle having an arched bearing surface concentric with the axis of the shaft, end bearings for said shaft, a hanger having an arched surface adapted to engage in the saddle and provided with a bearing concentric with the arched surface Uf said hanger, substantially as described.

-3. -The combination of a cran-k case made with one end wall and the side walls integral, a removable end Wall, bearings in the said end Walls for a crank shaft, a saddle adapted to engage a middle bearing member for said crank shaft, and a hanger adapted to engage said saddle and having an arched bearing surface adapted to pass through the end opening in said crank case, substantially as described. i

4. In combination with a crank case provided with one endvclosure made integral therewith and having a shaft' bearing central. thereto, a removable end closure having a shaft bearing central thereto, a hanger ar- `ranged to support the shaftl at the middle vlmint having a bearingarranged to engage said shaft and an arched bearing arranged to engage the case, the said arched l.' ea1'i11g being concentric to the shalt bearing, and nie-ans for securing the said bearing to said case,

ibstantially as described.

In testimony whereof I aiiix my signature in presence of two Witnesses.

CHARLES HERRESHOFF.

Witnesses T. C. CUMMING, N. P. BUMP. 

